[R] Error messages using nonlinear regression function (nls)

Hi all, I am trying to use nonlinear regression (nls) to analyze some seed germination data, but am having problems with error codes. The data that I have closely matches the germination dataset included in the drc package. Here is the head of the data temp species start end germinated TotS

[R] Passing strings with spaces to Python using system2 splits string at whitespace

Hi all, I am trying to pass arguments to a python script using R, but am running into a problem with the string being split on the white spaces. Investigation on the python end suggests that it is happening upstream from python, because other shells such as bash have generated similar errors.

[R] Using R for agent based modeling

Hi all, I am wanting to model some patch dynamics using raster objects in R and am trying to figure out the best way to do it. I want to treat each "patch" (pixel, cell, grid) and assign multiple attributes (for example biomass, temperature, precipitation, etc). I know that I can do this using

Re: [R] [EXTERNAL] Re: Understanding power analysis in glm and binomial proportion test

:42 PM To: Wall, Wade A ERDC-RDE-CERL-IL Cc: r-h...@stat.math.ethz.ch Subject: [EXTERNAL] Re: [R] Understanding power analysis in glm and binomial proportion test While R is certainly used for statistical simulations as you showed, this list is really for questions about R programming, not

[R] Understanding power analysis in glm and binomial proportion test

Hi all, I am trying to run a power analysis using simulated data to compare the power of a glm versus a binomial proportion test to detect differences in proportions. For example, suppose you have some proportion that decreases by some amount over X number of time steps. .4,.39,.38,.37 . . . .